1. What is O-Ring Cut Length?

The O-Ring cut length is the precise length of cord needed to form a perfect O-ring when the ends are joined. It's calculated based on the average diameter of the O-ring cross-section.

2. How Does the Calculator Work?

The calculator uses the O-Ring cut length formula:

Where:

• \( OD \) — Outer diameter (mm)
• \( ID \) — Inner diameter (mm)
• \( \pi \) — Mathematical constant (3.14159)

Explanation: The formula calculates the mean circumference of the O-ring, which gives the optimal cut length for proper sealing.

3. Importance of Accurate Cut Length

Details: Precise cut length is crucial for creating effective O-ring seals. Too short results in gaps, too long causes buckling and improper sealing.

4. Using the Calculator

Tips: Enter both outer and inner diameters in millimeters. Ensure measurements are accurate for optimal results.

5. Frequently Asked Questions (FAQ)

Q1: Why use the average diameter for calculation?
A: Using the average diameter provides the most accurate cut length that accounts for both inner and outer dimensions of the O-ring cross-section.

Q2: What tolerance should I use for cut length?
A: Typically ±1-2% tolerance is recommended, but follow manufacturer specifications for specific applications.

Q3: Can this calculator be used for all O-ring materials?
A: Yes, the formula works for all elastomeric materials, though material stretch characteristics should be considered during installation.

Q4: How important is measurement accuracy?
A: Very important. Even small measurement errors can significantly affect the final cut length and sealing performance.

Q5: Should I add extra length for joining?
A: No, the calculated length includes the proper amount for a clean butt joint. Adding extra length will compromise the seal.